<svg width="24" height="24" viewBox="0 0 24 24" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
<path d="M20 4H4C2.9 4 2.01 4.9 2.01 6L2 18C2 19.1 2.9 20 4 20H20C21.1 20 22 19.1 22 18V6C22 4.9 21.1 4 20 4ZM19.6 8.25L12.53 12.67C12.21 12.87 11.79 12.87 11.47 12.67L4.4 8.25C4.15 8.09 4 7.82 4 7.53C4 6.86 4.73 6.46 5.3 6.81L12 11L18.7 6.81C19.27 6.46 20 6.86 20 7.53C20 7.82 19.85 8.09 19.6 8.25Z"/>
</svg>